After a period of weeks, the development of almost all major organs of an embryo has occurred.
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28
20
12
During the period of embryonic development, the development of all major organs of embryo is completed by 12 weeks.
Define foetus. After how many weeks of development, a human embryo is said to become a foetus?
During the first two months, the developing human is referred to as an embryo. The embryo has three layers from which all body organs develop. At the same time, placenta stores glycogen and fat in first two months of pregnancy. Why?